System of suspension.



P. PFORR. SYSTEM OF SUSPENSION. APPLICATION FILED MAR.1, 1007.

Patented Aug. 6, 1912.

n'n/enzion UNITED STATES PEENT OFFICE.

PH'IEIPP'IPFORR, OF BERLIN, GERMANY, ASSIGN OR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

SYSTEM or SUSPENSION.

Specification of Letters Patent.

Patented Aug. 6, 1912.

Application filed March 13, 1907. SeriaINo. 362,174.,

ITOIIIZZ whom 'it may concern:

Be it known that I, PHILIPP Promna subject of the Emperor of Germany, residing zit-Berlin, Germany, have invented certain new and useful Improvements in Systems of Suspension, of which the following is a specification.

The present invention relates to electric :railways and more especially'to systems of suspension of overhead conductor wires from which current is collected by a trolley or other collecting device carried by the car propelled by the current collected.

\Vhat is known as the catenary system of suspension has been used heretofore to a limited extent, and it consists of one or more stout wires or cables supported above the working wire with considerable sag to each span and from which the working wire is directly suspended by vertical hangers or tie rods disposed at relatively frequent intervals. This form of suspension has certain advantages over the ordinary system of suspension in that it requires fewer points of support, 6., poles, and the working wire is, by reason of the large number of points of suspension, relieved of much strain so that it is less liable to become broken, and in case it should break, it is impossible for the broken ends to fall suiticiently to become dangerous to persons or things passing over the sagging eifect of the working wire is somewhat diminished so that for high speed cars and systems of transmission of high tension, there is less arcing between working wire and collector than in forms of suspension.

The catenary systems of suspension heretofore in use have the disadvantage that the expansion and contraction of the catenary wire or cable under variations in temperature cause the Working Wire to be raised and lowered more or less at certain points, while at other points it remains substantially stationary and as a consequence it is impossible to maintain parallelism between the working conductor and the car tracks.

The present invention has for its object to provide a system of suspension which shall overcome the above-mentioned .disadvantages and also lessen the number of poles used. 4

Referring to the accompanying drawing forming a part of this specification. Figure ordinary 'a single track system.

along the roadway; more-.

1 shows in side elevation a system of catenary suspension as heretofore constructed: Fig. 2 is a similar view of my improved system of suspension; Fig. 3 is a plan view thereof; Fig. 4 is an elevation transverse to the roadway and showing a double track system; and Fig. 5 is a similar view showing As shown in Figs. 2 to 5, the posts 1 carry near their upper on which are located insulators 3 upon which rest the catenary or messenger cables 4. An intermediate suspension cable 5 extends along beneath each of the cables 4 and is connected thereto at points 6 located equidistant from the insulators 3. at about onequartcr the main span. A lower supporting cable 7 is connected to the intermediate suspension cable 5 at. points 8 located equidistant from the points of suspension 6 of the latter. The working conductor 9 is suspended from the lower cable 7 by means of short vertical suspenders 10 arranged equal distances apart and at. equal distances from the points 8. The working conductor 9 is held from swaying sidewisc by tie wires 11 extending horizontally therefrom to the posts 1 and at. the center of the span by stay wires 12 connected to successive posts 1 and drawn toward each other at intermediate points by short wires 13 connected to the working conductor 9.

In Fig. 1 the full lines indicate the positions assumed by the working conductor 9' and catcnary cable 4- when properly adjusted, and the broken lines show the positions assumed by the same parts when slightly contracted by low temperature. The working conductor 9 is carried measurably above its intended position at the cent r of the span, whereas it remains in substantially its original position at points beneath the supports of the catcnary cable 4.

The efiect of changes of temperature on my improved system of suspension is indicated in dotted lines. Fig. 2. The working conductor 9 is caused to rise and fall a uniform distance at all points so that when once adjusted in parallelism to the car track 14, no amount of expansion or contraction in the supporting system will disturb the parallelism.

Instead of employing three suspension wires 4, 5, and 7, as shown in Fig. 2, a greater or less number might be used acends braced cross-bars 2t g 1mm cordin tothe precision with it may I be desired to suspend] the working condujctor 9.

I I do not desire to restrict'myself to the trio railway conductor wires, comprising a particular form or arrangement of'parts herein ,shown and described, sinceiitis'ap- ,parent that theymay be changed and-modified withoutdepart-ing from my. invention.

What I claim as new and desire to secure by Letters Patent of'the United States, is,

1. The combination with-a suspension wire or cable arranged to sag betweensupports, of "a straight suspendedwire', and a sagging intermediate wire attached at interva s to the suspension wire "and at. more frequentintervals to the suspended wire;

2. I The combination with a suspension wire or cable arranged to sag between supports,

a suspended wire, and means for sugporting the suspended wire from the suspension wire and maintain its ('alinementv throughout changes in the degree of sag of the suspension wirecomprising an intermediate wire attached at intervals to the sagging suspension 'wire and having twice as man y*"" points of attachment with the suspended L wlre. a

3. An overheadsuspension system for elecmain-supporting wire'or cable supported at 30. intervals above the conductor'wire and arranged to sag-between points; of support, a second supporting wir or cable extending beneath "the main supporting wire or cable and-rigidly'conneeted theretoat points on opposite sides of and remote from the points of suspension of the latter so as to sag between its pointsofisup'port, and means for suspending the conductor wirezfrom the sec- 00nd supporting wlreqor cable at points on 40 oposite si s of and remote from the points 0 suspensmnof thelatter. 1

' In witness whereof, I Have hereunto set .my'hand this 20th day of February, 1907.

, ,PHILIPP-BFORRz Witnesses;

'JULIUs RfiMnA'Nn,; I

topics of this patentimay be obtained forflve' cents each, by addressing the dominiasioner 6! Patents,

Washington,'D. O. 

